title: Detection of conjugal transfer systems in oral, black-pigmented Bacteroides spp.
abstract: Oral, black-pigmented Bacteroides spp. are important pathogens in oral anaerobic infections and dental disease. We detected conjugation systems in isolates of Bacteroides denticola and Bacteroides intermedius that transferred tetracycline resistance (Tetr) and penicillin resistance to Bacteroides buccae and to Bacteroides fragilis, an intestinal Bacteroides species. A cloned Tetr gene from B. fragilis hybridized to the transferable Tetr locus in the oral strains, indicating that genetic exchange occurs between these two groups of anaerobes.
authors.affiliation: Department of Medicine, University of California, San Diego 92103.
authors.forename: D G
authors.initials: DG
authors.lastname: Guiney
authors.forename: K
authors.initials: K
authors.lastname: Bouic
mesh_terms: D001439:Bacteroides / Q000235:genetics*; D003227:Conjugation, Genetic; D006801:Humans; D009055:Mouth / Q000382:microbiology*; D010403:Penicillin Resistance / Q000235:genetics; D013753:Tetracycline Resistance / Q000235:genetics*